NITROGEN REMOVAL FROM MUNICIPAL WASTEWATER USING INTEGRATED FIXED FILM ACTIVATED SLUDGE PROCESS AND ANOXIC PROCESS. ASEAN Engineering Journal, [S. l.], v. 9, n. 2, p. 17–27, 2019. DOI: 10.11113/aej.v9.15510. Disponível em: https://journals.utm.my/aej/article/view/15510.. Acesso em: 6 apr. 2025.